化学
部分
立体化学
二聚体
细胞毒性
萜类
圆二色性
生物化学
体外
有机化学
作者
Zhenlong Yu,Meirong Zhou,Weiyi Wang,Yibo Chang,Cheng‐Peng Sun,Xia Lv,Chao Wang,Wen‐Yu Zhao,Xiaochi Ma
标识
DOI:10.1016/j.bioorg.2022.105759
摘要
Bislangduoids A and B, a novel class of dimeric diterpenoids based on ent-abietanes tethered by C-17-C-15' bridge, were identified as trace components from a traditional Chinese medicine Euphorbia fischeriana (Langdu). Bislangduoid A features a highly oxidized scaffold incorporating a cage-like pentacyclic core. Their structures were elucidated by extensive spectroscopic techniques, electronic circular dichroism, and NMR calculations. The biosynthetic pathway for the dimeric skeleton and the unique caged moiety via Michael and acetal-formation reactions was proposed. Bislangduoid A showed pronounced cytotoxicity against HepG2 cells through the mitochondria-dependent apoptosis pathway.
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